Re: puzzled with using getenv for getting shell environment variable

Sorry. The syntax should be:
export fil

not:
export $fil

 -dave

On Nov 1, 2011, at 12:33 PM, David Brown wrote:

> Hi Eric,
> In your shell script you have made FILI into an environment variable, but fil is only a shell variable. That is why NCL cannot see it. In your 'for' loop you need to export $fil before calling ncl.
> -dave
>
> On Nov 1, 2011, at 10:45 AM, Erik N wrote:
>
>> I'm having difficulty with passing a shell environment variable to the
>> ncl script with the getenv command.
>> The environment variable is "fil."
>> The shell script works fine.
>> But when I look at the ncl output using the print statement, the
>> string is missing. It is supposed to say "ncep2_grid_Experiment_.... "
>> Is this expected?
>>
>> -Erik
>>
>>
>> ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; shell script
>> [nobleeu@Erik-Nobles-iMac] ncep2_grid $ cat loop_ncl_script.sh
>>
>> #!/usr/bin/env bash
>> # loop through set of files with a ncl script
>> export WORKDIR=$HOME/myWorkDir/POST_PROCESSING/20km_CAM_6_hour/winds/ncep2_grid
>> export SCRIPTDIR=.$HOME/myWorkDir/myScripts/ncl/
>>
>> # List Files
>> cd $WORKDIR
>> echo $PWD
>> export FILI="ls ncep2_grid_Experiment_*"
>> echo $FILI
>> # Loop through list of files
>> for fil in $FILI
>> do
>> if [ ! -e "$fil" ] # Check if file exists.
>> then
>> echo "$fil does not exist."; echo
>> continue # On to next.
>> fi
>> # echo "Extract Variable from $fil . "
>> # Execute script <- make sure that ncl script reads env. variable $fil
>> time ncl test.ncl
>> done
>> echo "Finished."
>> exit 0
>>
>> ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;NCL CODE
>> ;;test.ncl
>>
>> file_in = getenv("fil")
>> print(file_in)
>>
>>
>> ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;TERMINAL OUTPUT when executing shell script
>>
>> [nobleeu@Erik-Nobles-iMac] ncep2_grid $ ./loop_ncl_script.sh
>> /Users/nobleeu/myWorkDir/POST_PROCESSING/20km_CAM_6_hour/winds/ncep2_grid
>> ls ncep2_grid_Experiment_01_UV.nc ncep2_grid_Experiment_02_UV.nc
>> ncep2_grid_Experiment_03_UV.nc ncep2_grid_Experiment_04_UV.nc
>> ncep2_grid_Experiment_05_UV.nc ncep2_grid_Experiment_06_UV.nc
>> ncep2_grid_Experiment_07_UV.nc ncep2_grid_Experiment_08_UV.nc
>> ncep2_grid_Experiment_09_UV.nc ncep2_grid_Experiment_10_UV.nc
>> ncep2_grid_Experiment_11_UV.nc ncep2_grid_Experiment_12_UV.nc
>> ncep2_grid_Experiment_13_UV.nc ncep2_grid_Experiment_14_UV.nc
>> ncep2_grid_Experiment_15_UV.nc ncep2_grid_Experiment_16_UV.nc
>> ncep2_grid_Experiment_17_UV.nc ncep2_grid_Experiment_18_UV.nc
>> ncep2_grid_Experiment_19_UV.nc ncep2_grid_Experiment_20_UV.nc
>> ncep2_grid_Experiment_21_UV.nc ncep2_grid_Experiment_22_UV.nc
>> ncep2_grid_Experiment_23_UV.nc ncep2_grid_Experiment_24_UV.nc
>> ncep2_grid_Experiment_25_UV.nc ncep2_grid_Experiment_26_UV.nc
>> ncep2_grid_Experiment_27_UV.nc ncep2_grid_Experiment_28_UV.nc
>> ncep2_grid_Experiment_29_UV.nc ncep2_grid_Experiment_30_UV.nc
>> ncep2_grid_Experiment_31_UV.nc ncep2_grid_Experiment_32_UV.nc
>> ls does not exist.
>>
>> Working on ncep2_grid_Experiment_01_UV.nc
>> Copyright (C) 1995-2011 - All Rights Reserved
>> University Corporation for Atmospheric Research
>> NCAR Command Language Version 6.0.0
>> The use of this software is governed by a License Agreement.
>> See http://www.ncl.ucar.edu/ for more details.
>>
>>
>> Variable: file_in
>> Type: string
>> Total Size: 8 bytes
>> 1 values
>> Number of Dimensions: 1
>> Dimensions and sizes: [1]
>> Coordinates:
>> Number Of Attributes: 1
>> _FillValue : missing
>> (0) missing
>>
>> real 0m0.173s
>> user 0m0.011s
>> sys 0m0.008s
>>
>> <snip>
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Received on Tue Nov 1 12:41:03 2011